The turbo pure sterilizer's hepa filter will ensure maximum purity of your bottles and accessories after sterilization. Thanks to its unique "pure drying" function (30, 45, or 60 minutes), the hot air forced deep into the bottle is cleansed of bacteria, dust mites and other allergens by the hepa filter. This is the safest, most hygienic way to dry your baby bottles, teats and other accessories after sterilization. Any humidity and pollutants contained in the air are eliminated (99%).